If you have CSS validation errors with Alex King’s WordPress plugin called Share-This which happens to be installed on this site, just look below, there is now a fix posted by TechRoam. Thanks, TechRoam. You will need to edit the share-this.php file inside the plugin folder and make the following changes.
background: url(â€™.$key.â€™.gif) no-repeat 2px center;
background: url(â€™.$key.â€™.gif) no-repeat center; background-position: 2px;